Hewlett-Packard Co. is negotiating to buy technology services provider Electronic Data Systems Corp. in a deal that could help the world's largest personal computer maker snap up more data management and consulting contracts.

Treasury prices mostly rose Friday after steeper-than-expected losses at insurer AIG stirred fresh concern about strains still taxing the global financial system and as stocks retreated following another advance in oil prices.

Treasurys extended their rally into a second day Thursday, as the soaring price of oil and concerns about a resulting slowdown in consumer spending drove investors to the security of government issues.